THEORY OF m-SYNTHESIS FOR SINGLE MACHINE POWER SYSTEMS LOAD FREQUENCY CONTROL
Hossein Shayeghi - Mehdi Karrari - Mohammad Bager Menhaj
Load Frequency Control (LFC) has received considerable attention
during last decades. Most of the papers published so far, however,
have assumed the availability of an accurate model of the power
system which is not a realistic assumption. This paper employs the
m-synthesis to design a robust controller for a single machine
power system with modeling error and parameter uncertainties. The
simulation results show that the proposed controller is robust to
load disturbances and operating point variations. It guarantees
stability and performs well even in the presence of Generation
Rate Constraints (GRC). Compared with Hoo controller, it
not only shows robust stability, but also robust performance.
Mixed-m analysis is used to determine the stability limits.
Keywords: Robust Control, analysis, synthesis, Load Frequency Control, Power System